is 2 1757401 - 1
has 529031 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L138B22FBFA256E9Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.907968.6567%2475400866600000.55557.9546%17.463471.1500%2.4932%
PrimeNet2570.010963.1579%80001400000.00122.8047%0.012164.1912%1.0333%
GPU722610.174865.5738%80001100000.00111.4139%0.175966.0605%0.4868%
Difference+6+16.7331+3.0829%+2467400+86550000+0.5544+6.5407%+17.2875+5.0894%+5.0894%

Known prime factors (1 factor, 70.6 bits, 0.00401963% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
175740118410595096241933896472270.641523801770234623
23 × 64879 × 351022519
2016-01-0364879351022519175.521.50922.8098

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-09T16:51:00Carsten Kossendeyleela950001567500---0.014--2.412%
2014-04-08T23:01:00Jocelyn LaroucheManual testing100000100000---0.008--0.888%
2014-05-09T20:31:00Jocelyn LaroucheManual testing136522136522---0.011--1.059%
2014-09-17T22:20:00ANONYMOUSManual testing173044173044---0.014--1.202%
2015-04-27T11:36:00mikrMSI247540086660000---0.556--7.955%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:28:50Mark RoseManual testing21260--0.087--
2010-04-23T08:42:00Architects Cubedi4l_1260261--0.087--
2016-02-23T16:28:50Mark RoseManual testing261262--0.175--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.908--
2016-02-23T16:28:50Mark RoseManual testing262263--0.559--
2015-05-14T02:58:00snme2pm1Manual testing263264--1.117--
2015-05-14T02:58:00snme2pm1Manual testing264265--2.126--
2015-09-06T20:47:00ramgeisManual testing265266--4.252--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.465 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.465 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025117.26
50000500000030.206


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers138B22FBFA256E9D0.095
2015-06-27T00:56:00MadPooManual testing138B22FBFA256E9D0.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:32:47alpertronManual testing
1841059509624193389647
AFC0429A3D2B47__no
2017-10-19T16:22:26Oliver KruseThreadripper
1841059509624193389647
AFC0429A3D2B47__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1567500 (P-1 stage 2)
B1 = 173044 (P-1 stage 1)
B1 = 136522 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
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106
107
103
104
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107
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109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
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2100
Last modified: 2020-08-14T09:28:58+00:00